Sampiie-takibtg device



W. E, REIVIBERT. SAMPLE TAKING DEVICE. APPLICATION'FILED SEPT-19, 1919.

Patented Apr. 13, 192% E REMSEQ'P awwemtoz 3% flaw/w W. W

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WILLIAM E. REMBEPJT, GE HUMBLE, TEXAS.

$AMPLE-TAKING DEVICE.

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Application filed September 19, 1819.

To all whom it may concern Be it known that 1, WILLIAM E. lnainnnr, a citizen of the United States, residing at Humble, Harris county, Texas, have invented a certain new and useful Improve ment in Sample-Taking Devices, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a device for securing samples of the strata or formation through which a well is being drilled.

It is frequently desired during the progress of drilling a well to obtain samples of the formation so that a log of the well may be preserved, but owing to the fact that the slush and mud pumped into the well mixes with the formation being cut, it is dilhcult to secure a satisfactory sample.

One object of my invention is to provide a device which may be attached to the drill stem and be used to cut a portion 01 the f0rmation and to retain the same within the drill so that it may be raised to the surface for preservation.

Another object is to provide a device of the character described which will be simple of structure and easy to operate and which will preserve the sample from injury while the device is operating.

Referring to the drawing forming a part of this specification, and wherein like numerals are applied to like parts throughout the several views, Figure 1 is a central longitudinal section through my device showing the same attached to a drill stem; Fig. 2 is a transverse section on the plane 2-2 of Fig. 1; Fig. 3 is a similar section taken on the plane 3-3 of Fig. 1; Fig. d is a bottom plan view on an enlarged scale or" the bit used with my device; Fig. 5 is a central longitudinal section of the said bit, and Fig. 6 is a side elevation thereof taken at right angles to the view shown in Fig. 5; and Fig. 7 is a section on plane 77 of Fig. 1.

The sample taking device forming the subject oi my invention constitutes an at tachment to be secured to the lower end of a drill stem and used first to flush out the hole already drilled so that a clean sample of the strata may be obtained and to thereafter be rotated to cut ofi a sample of the formation Specification of Letters Patent.

Patented Apr. 13, 1920.

Serial no. 32 801 thrrmgh which the drill is operating, and to then be withdrawn from the well, together with the sample thus obtained.

The attachment is represented in assemform in 1. A drill bit 1%, preferof the type shown in the drawing, is secured at the lower end a length of drill pipe 5. At the upper end of said length of orill pipe coupling 6 serves as an attachment to a swaged nipple 7 which is reduced in diameter and threaded interiorly at its upper end for attachment to a shank S. The lower half of the said shank S is square on its outer face, but is rounded at the lower end and threaded at 10 for attachment within the nipple 7. The upper half 11 of the said shank is cylindrical in shape and is provided with a conical shaped head 12 threaded at 13 on its'outer face for attachment with a swaged coupling member 14, The upper end of this coupling member is threaded eXteriorly at 16 for attachment to the drill stem 17. Below the conical seat, within which the head 12 is attached, the coupling member 14 is provided with a squared opening 15 adapted to receive the lower portion 9 of the shank.

Between the swaged coupling nipple 7 and the upper end of the section 5 is secured a diaphragm 18 which serves to close the central passage which extends downwardly through the sections-making up my device. This diaphragm is a circular disk threaded on its outer periphery so that it may be secured within the coupling member." 6. This diaphragm is pierced by a central opening 19 tapered toward its upper end to form a seat for a frusto-conical shaped valve 20. This valve is adapted to open downwardly and is held within its seat by spiral spring 21 bearin g at its upper end upon an enlarged extension 22 of the valve stem 28, and at its lower end upon the diaphragm 18.

A plurality of other smaller openings 2i are made in the said diaphragm, these openings being tapered inwardly toward the lower end to form seats for the upwardly opening valves 25, similar in structure to the valve 20 just described. These smaller valves are held in place by smaller and weaker springs than is the central larger valve 20.

The construction of the bit used with this device is in form a core bit and may be any preferred type, but the form of the bit shown in the drawing is found to be especially adapted for this use. This bit comprises a cylindrical outer portion 26 closed at its lower end by a diaphragm 27 and provided with a short downwardly extending screw point 28 serving to guide and steady the bit. The bottom diaphragm 2'? is provided with a sector shaped opening 29, one edge 30 of which is bent downwardly and sharpened to a point, as shown at 31, to form a cutting blade adapted to shear ofi? the material from the bottom of the hole. The side of the cylindrical shaped bit is also cut upwardly at 32 and bent outwardly and sharpened to a cutting edge at 33 so as to shear oft material from the side of the hole and provide a proper clearance for the action of the bit.

In order that material thus sheared 0E from the bottom of the hole and forced upwardly within the chamber constituting the interior of the bit may be retained therein when the bit is raised from the hole, I may use a thin metallic sheet or membrane 3% which is shaped to cover the opening 29 in the bottom of the bit, being riveted, or otherwise secured to one side of the open ing and extending across the same so as to rest on the opposite side thereof. This sheet of metal is very resilient and ordinarily extends slightly upward from the bottom of the bit so as to leave an opening through which water forced downwardly through the bit'may be discharged. against the bottom of the hole. This membrane will, however, be forced downwardly by the weight of the material above and when the bit is hoisted upwardly will close the opening and prevent the loss of the material within the bit.

In the operation of my device I attach the same to the lower end of the drill stem, as shown in Fig. 1, the head 12 of the attachment being threaded within the coupling member 14-, the device is then lowered to the bottom of the well and a strong current of flushing water is pumped downwardly through same. The valve 20 will be forced out of its seat by the strong pressure of the pumps and the current of water will be thus projected downwardly through the pipe 5 and the bit 4: and discharged through the opening 29 against the bottom of the hole, washing away. the mud and slush which will be carried in suspension upwardly around the drill stem to the surface of the ground. When the hole has been thoroughly cleaned the bit will be allowed to rest upon the bottom of the hoe and the drill stem will be rotated in a right hand direction so as to unscrew the head 12, upon the shank 8, from its seat within the coupling member 14, thus allowing the coupling and the drill stem to which it is attached to be lowered downwardly along the shank 8. The squared portion 9 of the shank has two of its opposite corners grooved out at 35 to allow passage for flushing water, which finds an outlet latorally through channels 36 at the lower end of the coupling member 1a. When the coupling 14 has been telescoped downwardly over the squared shank 9 and the lower end thereof is seated upon the upper end of the coupling nipple 7 the weight of the drill stem may thus be exerted downwardly upon the bit. The rotation of the drill stem in this position will thus cause the rotation of the bit a at the lower end thereof. Flushing water in the drill stem 17 will then find an outlet through passages 35 and 36 and back upwardly to the surface. The pressure in the pipe 5 will no longer be sufiicient to force open the valve 20 to flush the bit 4:. When the bit is thus operating the sharp edge of the blade 30 will shear ofi material from the bottom of the hole which will be forced'upwardly past the sheet metal diaphragm 3st into the interior of the bit. The operation of the toolfor a suitable length of time will obtain a sample of the material filling the interior of the .bit and the length of pipe 5 therea'bove. Any fluid, such as water or air, remaining in the pipe 5 will be allowed to escape by their pressure against the valves 25 in the diaphragm 18. When the desired amount of sample has been obtained the drill stem and the sample taking device attached thereto may be withdrawn from the well and the sample removed and preserved to record the log of the well.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A sample taking device comprising a coupling member, a hollow shank secured therein, a length of pipe on said shank, a valve controlled diaphragm at one end of said pipe and a hollow cylindrical shaped bit at the other end thereof.

2. A sample taking device comprising a coupling member, a threaded conical seat therein, a squared channel below said seat, a tubular shank, a conical head secured within said coupling, the upper portion of said shank being cylindrical in shape and the lower portion being squared eXteriorly, a sampling bit secured on said shank and means to normally prevent the passage of Ivovater downwardly through said shank and 3. In a sample taking device, a coupling member, a tubular shank secured detachably thereto, a pipe secured to said shank, valves m said pipe to control the passage of fluid therethrough, a sample taking bit on'said pipe comprising a cylindrical container having an opening in the lower end thereof, a

cutter at one side of said opening and means to close said opening when the drill is raised from the hole.

4. A sample taking. device comprising a telescoping sleeve and shank adapted to be detachably secured together, a pipe connected with said shank, means to control the passage of fluid in said pipe, and a bit on said pipe adapted to cut and retain material from the bottom of the hole.

5. A sample taking device comprising in combination a bit adapted to cut and retain material from the hole, a pipe, a diaphragm across said pipe, valves therein controlling the free passage of water in both directions, a tubular shank on said pipe whereby it may be rotated, a drill stem and an adjustable connection between said shank and said drill stem.

6. A sample taking device comprising a bit adapted to cut and retain material from the hole, a drill stem, means to conduct flushing water through said bit and flush the hole, means to thereafter discharge the water above said bit and means cooperating with said drill stem to rotate said bit.

7 In a sample taking device, a drill stem, a bit, a pipe on said bit, a tubular shank on said pipe, a head on said shank for attachment to said drill stem whereby water may be pumped down to said bit, said shank being cylindrical toward its upper end and polygonal at its lower end, a coupling member on said drill stem detachably secured to said head and having a polygonal opening therethrough to receive said shank and to rotate same, and means to allow escape of flushing water during the rotation of said bit when said head is detached from said stem.

In testimony whereof, I' hereunto afiix my signature, this the 15 day of September, A. D., 1919.

XVILLIAM E. REMBERT. 

